Abstract: The film tends to be out of alignment and its length varies in the process of unwinding,cutting and transferring in carton overwrapper YB95A.The film transferring was driven independently by a servo motor instead of by main drive via referring to the design of carton overwrapper YB917.To achieve that,a servo motor and relevant sensors,encoders and electronic control programs were added.The control unit of the independent transferring device was integrated into the MICRO II control system,and its control program become parts of the MICRO Ⅱ control program.The adjustment of film length and seam position would be fulfilled by changing the setting on IPC(Industrial Personal Computer).The results showed that the transferring error reduced from ±2 to ±0.5mm,and the defective cartons decreased from 20-25 to 0-2 carton/day;the cutting length and transferring position of film were automatically regulated.The modified carton overwrapper YB95A is adaptive for color printed film as well.